Spring clamping device.



JK A. MUDD. SPRING GLAMPING DEVICE. APPLIoATIeN FILED um. se. 1909.

@29 i 63, Patented Aug, 24; 19091.

reef-rre* A. norm, or onrciteo, reinicie.

S'ERXNG CLAM'ING DEVICE.

Specification o Letters atent.

Appleaonied March 26, 1%9, Serial No. 435,980.

To all whom it may concern.: Y

le. it known that I, Josemi MUDD, 2i citizen ot' the United Sintes, residing nt Chicago, in the county of Cool( :intl Stute of Illinoi's, lnive invented :i new :unl useful Spring` vClamping Device, ot' which the following,- is

'n simple, novel construction of the .springhncl whereby its tension shell be rendered ysuch :is to adept it t firmly chimp between its jews n singlesheet, even 'of the thinnest paper, :is lwell es zi block of sheets.

Y-lnving especially `devised my improve mentvto ii'ord the spring-brick ot' ii teniporary binder, it is herein shown and described in that connection.

ln the accompanying drawing, Figure l is n perspective View of a binfler embodying my improvement; Fig. is :t similar View ot' the sinne in opened condition und with a pol-tion ol one of the covers broken away; Fig. 2 is on end view ot' the two side-ineinhers ot' the spring-heck showing them in :ilmtting relntion and in their condition piepnrntonv to uniting themby ineens of me thiril member; Fig. 4 is :i similar View o the completed. sprii'1,'-lmclc, und. Fig. 5 is u view in the nature ot' :i tlingfrinn, showing one ol" the two members of ifig by tullline representation in un enti view anni the cooperating corresponding member by ciotteitline representation to illustrate tenciency ol the gripping' etuis ot" 'the members to pass mich other nml thus tension the the heini; and each or (es shown) one of 'the teibpieecs hns its extremity formed with s series ot'cylintlricel eyes 13 to produce hinge'- meinhersto eiternzite with similar members H provided on the'etlge oto cover 15. The third member, 16, et the beck consistso'f [hit strip of metal, preferably steei, having its edge-portions bent toward each other to form tolds'l overlapping the encisections 11 of the members and 8, thereby uniting the two :intl straining these normally oblique. sections to 'and holding them in :ilining positions, with the result of greatly tensioning the springs with their tnil-pieces abutting against one another in the relation they occupy with the members ussenililetl to torni the spring back.

To construct my improved binder, the side-members 7 and 8, prelli-iratorily formed in the condition in which they irre represented in Figs. 3`nnd 5, ire united by bend-l ing or(y enel upon their oblique encisectious il the edge-portions oit the straightmember, thus forcing them tothe straight niining positions in which they are represented in the h'nished back ot' Fig. 4f, with their tail-pieces abutting` to establish the tension throughout each side-member, which is augmented by so straightening the sections 1l; and the degree of tension willV be greater or iess te the greater .inclination of the tai indicated by the dotted rept 1 Fig. 5, or their lesser inclination resulting" .in the respectiv y eorrecion press-nre against. each other oi.' the tnirpieces where they tornrtne cooperating gripinng,`

ot the back. it" only the cover l is to' behingctliy connecte` with the beek. it alone provideffi with spaced c vlintir. l eyes ifi to between the hiii ceyes 13 cnil he connected ti'ierewitli by i hinge-pin or pintle 1S passing; through the entire' series'. The other cover i9 may he attached in the sume immner, ifit be desired to hinge both covers, but. it. is shown to be riveteto the tail-piece of baclmnember 8. The construction thus described provides on e binder e, spring-beck et very simple construction, invoiving tew parte and. affording e spring-clip which will exertsuficiente tension on the thinnest sheet ot peper te grip it securely between its jews, 7 "e be ing adept-eti to be readily sprecn wt, by

straining the hn red arc-,ver l5 bneimverfiy, to admit efnyfny of sheetsbet f the f there.

Patented Aug. 254i, Een? My improved spring elampingderee muy be used for pur oses other than binderbacks, so that I to a binder-back.

`What I claimv :1S new :ind desire to secure by Letters Patent is-- 1. A s ring clamping-device,.eonsisting of a pair. 0 membersv composed of spi'ilig-n'iet:1l and formed with heads having straight ends within them and with tail-pieces extending toward each other from the heads, and a third member composed of a strip of .metal with its edge-portions secured to said ends and uniting and tensioning the members of said pair with their tai1-pieees abutting and forming jaws.

o not limit mi' invention l 2. A spring elampingdevieeE consisting of i n pair of members eon'iposed of spring-metal :1nd formed with heads having similar 'st'raigl'it ends within them and with tail- 1 pieces extending toward eneh other from the l heads, und a third member eon'lpo'sed of a strip of spring-metal with its edge-portions folded over and eonining said ends and I uniting und tensioning -the members of said pair with their tail-pieces abuttingnnd forming jaws.

JOSEPH A. Mmm.

K. M. (JoRNwALL7 i In presenceofl R. A. SUHAEFER. 

